U-Boot Block Cache Statistics: Showing Counters Does Not Make the Next Read Cold
Distinguish a fresh statistics interval from empty cached content and explain request-shape effects on hit accounting.
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U-Boot Fastboot Sparse Images: DONT_CARE Chunks Do Not Clear Existing MMC Data
Separate sparse logical progression from written data so skipped MMC regions are not mistaken for zero-filled or sanitized contents.
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U-Boot sf update: A Partial Sector Uses Read-Modify-Write, Not a Small Physical Write
Distinguish requested-slice comparison/statistics from full-sector read-modify-erase-write and normal-success tail preservation.
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U-Boot GPIO Input Status: A High Pin and a Failed Read Can Share the Same Return
Disambiguate GPIO sampled level from legacy shell return and qualify the separate environment-value path.
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U-Boot USB Rescans: Why Repeating usb start Can Keep an Old Device Inventory
Distinguish already-started no-op from teardown/rescan and resolve removable storage identity again after a refresh.
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U-Boot Cyclic Callbacks: Registration Does Not Guarantee a Watchdog Service Deadline
Trace cooperative scheduling gaps, callback timing and watchdog service registration rather than treating a configured period as a deadline.
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U-Boot Log Filters: Why Adding One Deny Rule Can Silence Everything
Explain the empty-list default, first-match filter policy, deny insertion order and forced-debug boundary.
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U-Boot ext4 Writes: Separate Filesystem Metadata Resources from File Length
Budget per-block-group bitmaps, descriptors and journal structures before using payload size to estimate ext4 write memory.
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Yocto Bundled Initramfs: Explain the Extra Kernel Pass Without Creating a Dependency Cycle
Explain Yocto bundled-initramfs task topology, the late image dependency and second kernel pass, then isolate cycles, missing cpio inputs and wrong deployed variants.
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Yocto Private Libraries: Prevent a Bundled Copy from Becoming Another Package Provider
Prevent private shared-library provider registration while accounting for PRIVATE_LIBS matching scope and its additional suppression of the declaring package’s needed-library lookup.
